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chiptune_player: minor optimization

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This commit is contained in:
Vince Weaver 2018-03-10 23:00:57 -05:00
parent 7af457f04a
commit 254cd0b163
1 changed files with 5 additions and 9 deletions
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14
chiptune_player/interrupt_handler.s
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@ -55,8 +55,7 @@ mb_write_loop:
cpx #13 ; 2
bne mb_not_13 ; 3/2nt
cmp #$ff ; 2
beq increment_offset ; 3/2nt
bmi increment_offset ; 3/2nt
;============
; typ 9
mb_not_13:
@ -98,7 +97,8 @@ mb_load_loop:
lda (INL),y ; load register value ; 5
sta REGISTER_DUMP,X ; 4
;============
; 9
;====================
; point to next page
;====================
@ -112,7 +112,7 @@ mb_load_loop:
cpx #13 ; if 14 we're done ; 2
bmi mb_load_loop ; otherwise, loop ; 3/2nt
;============
; 19
; 18
;=========================================
; if A_COARSE_TONE is $ff then we are done
@ -124,13 +124,11 @@ mb_load_loop:
jmp quiet_exit ; 3
;===========
; typ 13
; typ 6
mb_not_done:
;==============================================
; incremement offset. If 0 move to next chunk
;==============================================
@ -202,8 +200,6 @@ back_to_first_reg_c:
update_r0_pointer:
sta INH ; update r0 pointer ; 3
;============
; 18
;=================================